Medicine for preventing and treating yellowtop of pear trees

Abstract

The invention discloses a medicine for preventing and treating yellowtop of pear trees. The medicine comprises the following components in percentage by weight: 3 to 15 percent of composite humic acid, 5 to 20 percent of organic matter, 3 to 8 percent of urea, 0.3 to 0.5 percent of magnesium sulfate, 0.1 to 0.3 percent of manganese sulfate, 8 to 15 percent of monopotassium phosphate, 1 to 3 percent of chelate iron or complexing iron, 0.1 to 0.5 percent of chelate zinc or complexing zinc, 0.1 to 1 percent of black alum FeSO4 and 40 to 80 percent of water. The medicine has special effects of killing pathogenic germs, bacteria and fungi of yellowtop of the pear trees and preventing the yellowtop of the pear trees.

Description

technical field [0001] The invention belongs to the field of medicine for fruit trees, in particular to a medicine for preventing and treating yellow leaf disease of pear trees and a preparation method thereof. Background technique [0002] Pear tree is a large fruit tree species in my country, which ranks first in the world in terms of cultivated area and total output. In recent years, my country's pear production has been more than 9 million tons per year, which is close to 50% of the world's total pear production. However, in the production of pear trees in our country. Cultivation levels in various places are uneven, and the yield and quality of fruits vary greatly. The yield per unit area ranges from several hundred kilograms to four to five thousand kilograms per mu. Among them, there are reasons for both plastic pruning and pest control. There are also reasons such as site conditions. Due to the large scope of cultivation of pear trees in our country, the site cond...

AI Technical Summary

Problems solved by technology

However, a large part of pear trees in our country are planted on clay soil with a sticky soil structure, and because pear trees have strong adaptability, it is difficult to achieve thorough soil improvement in orchards for pear trees planted on this part of the soil.

Due to the poor aeration of the sticky soil, a large number of trace elements in the soil cannot be converted into effective states to be absorbed and utilized by the pear tree, which causes the nutritional ratio of the fruit tree to be out of balance and the physiological disease of yellow leaves appears. Due to the yellow leaf disease, the chlorophyll content in the leaves It is greatly reduced, which in turn affects the fruit growth of the year, resulting in a decrease in fruit yield and quality.

At the same time, it also affects the formation of flower buds in that year. The traditional way to treat yellow leaf disease is to apply ferrous sulfate to the soil, which can have a certain therapeutic effect. The effect is not very satisfactory